21041014011 has 4 divisors (see below), whose sum is σ = 28054685352. Its totient is φ = 14027342672.

The previous prime is 21041013979. The next prime is 21041014013. The reversal of 21041014011 is 11041014012.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 21041014011 - 2⁵ = 21041013979 is a prime.

It is a super-2 number, since 2×21041014011² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (21041014013) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3506835666 + ... + 3506835671.

It is an arithmetic number, because the mean of its divisors is an integer number (7013671338).

Almost surely, 2^21041014011 is an apocalyptic number.

21041014011 is a deficient number, since it is larger than the sum of its proper divisors (7013671341).

21041014011 is an equidigital number, since it uses as much as digits as its factorization.

21041014011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7013671340.

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 21041014011 its reverse (11041014012), we get a palindrome (32082028023).

Subtracting from 21041014011 its reverse (11041014012), we obtain a palindrome (9999999999).

The spelling of 21041014011 in words is "twenty-one billion, forty-one million, fourteen thousand, eleven".